Apparatus for sharpening lawn-mowers.



.No. 850,071. PATENTED APR. 9, 1907. E. 0. SPRINGER.

APPARATUS 'FOR SHARPE NING LAWN MOWERS.

APPLICATION FILED DEO.28, 1905. I

D o O 0 O W/T/VESSES.

ATTOHNE rs i To albwhlo'm, it may concern:

- tan-sf ere;

ran.

i nRNEs'rosPRINeER, OF M-Asonci'rr, Iowa.

neeaearus- Foe ssnseame rswnowsee.

Be it known that I, ERNEST O. Srninenn, a citizen of the United States, and a. resident of Mason City, in the county of Cerro Gordo and State of "Iowa, have invented anew andIm- ,proved Apparatus for Sharpening Lawnits'working blades for the purpose of sharp-.

ening them.

, Theprincipal purpose of the invention is to' improve upon the construction of a device designed for the same purpose for which Letters Patent of the United States were granted, to me August 22, 1905, No. 7 97,873, to the extent that the device is rendered more simple and it is not needful to removethe wheels or change the gearing before placing a lawn-mower upon the device, it being necessary only to turn the lawn-mowerupside down and clamp it in position upon the device, whereupon the Wheels may be revolved through the medium cially adapted for the purpose.

struction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specifica- 0 A represents opposing cheek-pieces, which tion, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 isa front elevation of the device, illustrating a lawn-mower in position thereon.

cheek-pieces are curved and'are bifurcated at their lower ends to form legs 10 and, 11,

having apertured foot members 12 forattachment to a support. 1

At the upper end of each cheekpiece A a concavity 13 is formed, the forward walls of which concavities extend farther upward than the rear walls, as is clearly shown in Fig. 2. r

The cheek-pieces A are tied together and are held a suitable distance apart by means of a connecting-bar B, and the said 'baris usually secured to the cheek-pieces by producing lugs 14 on said cheek-pieces, and

bolts 15 are passed through said lugs and the connecting-bar B, the bolts 15 having suitable nuts applied thereto.

Specification of Letters Patent. Application ne neoember 28,1905. swarm. 293.690.

invention is to provide.

of a clamp-handle espe-.

7 blades are turned.

B, and said tongue is providedwith an aperture 17, preferably more or less elongated.

Patented April 9, 1 907.

A horizontal tongue. 16 i fo ed .5 1 v on the forward portion" of the connecting-bar A clamping-bolt 18 is passed throng-lithe,"

aperture in the said tongue 16, and said bolt is provided with an upper head-section 19.

opposite or lower end of. the bolt exterior more-orless downwardly curved; At the threads are produced, a a Wingmut screwed-upon said 'threaded surface of the bolt, as is shown in Figs. 1 and2. In operation the lawn-mower-is turned up; side down, and the axle ofjsaid lawn-mower is receivedin the concavities 13 of the cheekpieces A, as is shown in Fig. 1. The'head 19 j of the bolt 18 is adjustedover the axle ofthe Y lawn-mower. and thenut 21 is tightened on said bolt to hold the lawn-mower firmly in place.'

1 y In connection with the device a clamp O is !v employed for-revolving a traction-wheel of the lawn-mower while the mower isin posi- 8o tion on the sharpening device.- This clamp consists of a crank-handle 2 2, thelstraight'or body member whereof has an angular clampv y. ing-arm 23 secured thereto, providedwith a The invention consists in the novel conforked terminal 24, slightlyarehed. to fit .to 4

theperipheral surface of a traction-wheel of a mower. A second and similar clamping arm 25 is made to'slide loosely on the straight body portion of the handle 22, and a bolt v26 I is passed through the stationary clampingarm 23 and through :the slidable clampin arm 25, 'and at the end-of'the bolt. which passes through the latter arm a suitable nut 27 is located.

Afteror before the lawn-mower has been I placed on the device, as above described, the.

causing the crank-handle to be firmly attached to the said wheel, enabling the wheel to be readily turned by the operator by means of one hand whilethe other hand is employed for sharpening the blades of themower as the blade-carrier revolves. The

sharpening is usually accomplished by applying carborundum and oil by means of a brushto the blades of the mower as said Having thus described my i invention,

claim as new and desire tosecure by Letters Patent cheek-pieces and provided at its center of' length with a slotted laterallyrojecting tongue, and a hooked clamping-b0 tworking in the slot of the said tongue and provided with a nut on its lower end.

' 2. An apparatus for sharpening lawnmowers, consisting of opposin' curved cheekpieces provided with feet at t eir lower ends and having their upper ends recessed'to receive the axle of a lawn-mower, a connecting member for the cheek-pieces, provided with a lateral projection, and an adjustable hooked clamping-bolt carried by the rojection of the connecting member, sai bolt being ada ted for use in connection with the part of tide mower supported by said cheek-pieces.

3. An apparatus for sharpening lawnmowers, consisting of curved cheek-pieces having their 11 per ends recessed to receive a member of a awn-mower, a connecting-bar for the said cheek-pieces, a slotted tongue carried by said bar, and a hooked clampingbolt adjustable in the slot of said tongue.

' 4'. In an apparatus for shar ening lawnmowers, opposing curved cheeizieces having concavities in their upper en s, one Wall of each concavity extending upward beyond the other wall, a connecting-bar secured to the said cheek-pieces, a tongue extending from the said connecting-bar in the direction of the curvature of the cheek-pieces, which tongue is provided with an aperture, a bolt passed loosely through the said aperture of the tongue, having its upper end crooked and its lower end ortion threaded, and a nut located on the t readed portion of the said bolt below 'the said tongue.

' In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ERNEST 0. SPRINGER.

Witnesses .CnARLEs H. BARBER, LULU B. TYSON. 

